JPH08127775A - Penetrating water glass suspension chemical - Google Patents

Abstract

PURPOSE: To obtain a general-purpose water glass suspension chemical which has improved penetrating properties, which can be made to have any desired gel time from an extremely short to a long time regardless of its homogel strength by merely varying the concentration of slaked lime, and which can be made to have any desired homogel strength in a wide range regardless of its gel time by merely varying the concentration of fine particles of blast furnace slag. CONSTITUTION: A penetrating aqueous water glass hardener suspension for use in chemical grouting is prepared so that the suspension has a concentration of slaked lime (a) of about 2% to 35%, a concentration of fine blast furnace slag particles (b) of about 1% to 40%, and a concentration of the sum of (a) and (b) of about 40% or lower. By controlling these concentrations, the suspension can be made to have any gel time ranging from about 3sec to about 45min regardless of its homogel strength, and can also be made to have any homogel strength at a material age of 7 days ranging from about 1 to 40kgf/cm<2> regardless of its gel time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water glass suspension type penetrating chemical liquid used in a water glass chemical liquid injection method.

[0002]

2. Description of the Related Art Conventionally, in the water glass type chemical injection method, the optimum gel time and homogel strength (consolidation strength of only the chemical) are selected and used depending on the properties of the target ground. No water glass suspension type penetrating chemical solution or water glass type suspension penetrating high-strength chemical solution having a long gel time is provided.

Cement or blast furnace slag powder is used as a hydraulic component in a water glass type suspension type chemical liquid, which is required to have a high homogel strength as compared with a solution type chemical liquid, in order to improve permeability. Uses fine grain cement or fine blast furnace slag powder.

Since the hydraulic property of blast furnace slag powder is latent, a method of using slaked lime as a stimulant is generally adopted in order to reveal the latent hydraulic property.

Although a water-glass type solution type chemical has a low homogel strength, two types of chemicals having a quick-setting property and a slow-setting property have been conventionally provided, and the following method is generally adopted. Many. If you inject only the slow-moving drug solution, the slow-moving drug solution will flow out through the dissipation route to the end because the gel time is long.
The dissipative route of the slow-moving drug solution to be injected later is momentarily blocked, and then the slow-moving drug solution is injected to penetrate into the ground. This method is called multi-phase injection.

[0006] However, the suspension-type liquid medicine has a higher homogel strength than the solution-type liquid medicine, but since only the instantaneous penetrating liquid medicine is provided, in the case of multi-phase injection, the homogel strength is large and the instantaneous gel-forming strength is high. Only the suspension type penetrating drug solution and the solution type drug solution with low homogel strength could be used together, and the whole ground could not be improved to high strength. Despite these needs, a suspension type penetrating drug solution of water glass type having a long gel time has not been developed. In addition, although a quick-setting suspension type penetrating drug solution is provided, a super-flashing water-glass suspension type penetrating drug solution having a gel time of 5 seconds or less is not provided. The current situation.

[0007] Explaining only when a suspension-type curing agent aqueous solution is blended using a curing agent in a bag, all suspension-type chemical liquids currently on the market have a specific curing agent bag (a plurality of curing agent bags). Multiple bags of different types of curing agents may be used) to obtain a single gel time and a single homogel strength.

[0008]

Therefore, in a water glass suspension type penetrating chemical solution, it is the first development to make it possible to arbitrarily set various gel times from a super instantaneous setting chemical solution to a slow setting chemical solution. It is the first problem, and the second problem is that it is possible to realize high strength in any gel time from the super-instantaneous drug solution to the slow-moving drug solution. Further, the third problem is to improve the permeability of any of the water glass suspension type chemicals which satisfy the first and second problems. Furthermore, the fourth subject is to obtain arbitrarily many gel times and arbitrarily many homogel strengths by properly combining and blending the number of bags of at least one kind of bag-containing curing agent.

An object of the present invention is to provide a water glass suspension type penetrating chemical solution which solves the above problems.

[0010]

Means for Solving the Problems The present invention for attaining the above-mentioned object is to provide a suspension-type curing agent aqueous solution in the case of blending a suspension-type curing agent aqueous solution used in a water glass chemical injection method. The slaked lime concentration is in the range of about 2% to about 35%, the blast furnace slag fine powder concentration is in the range of about 1% to about 40%, and the slaked lime concentration in the suspension type hardener aqueous solution and the blast furnace slag fine powder are By setting the total concentration to about 40% or less, it is possible to set an arbitrary gel time within the range of about 3 seconds to about 45 minutes independently of the homogel strength, and independently of the gel time. , The homogel strength of 7 days old from about 1 kgf / cm ² to about 40 kgf / cm ²
It can be set arbitrarily within the range.

Further, in the case of blending the suspension type curing agent aqueous solution used in the water glass type chemical solution injecting method, the slaked lime concentration in the suspension type curing agent aqueous solution is set within the range of about 2% to about 35%. By setting the concentration of the slag fine powder within the range of about 1% to about 40% and by setting the total concentration of the slaked lime concentration and the blast furnace slag fine powder concentration in the aqueous suspension-type curing agent to about 40% or less, the homogel Independent of the strength, it is possible to set any gel time within the range of about 3 seconds to about 45 minutes, and independently of the gel time, the homogel strength of 7 days old is about 1 kgf / cm ² to about. 40 kgf / cm ²
Can be set arbitrarily within the range of 0% to 10%
It is a blast furnace slag fine powder in which slaked lime is replaced within a range of 0%, and is blended by appropriately combining the number of bags of at least one kind of a bag hardening agent having different substitution rates and / or net weights.

Further, the amount of slaked lime contained in the aqueous suspension type curing agent solution used in the water glass chemical injection method is in the range of about 1% to about 3% in terms of powder, and powder or A suspension type hardener aqueous solution to which a liquid dispersant is added, or a powder dispersant within a range of about 1% to about 3% with respect to the amount of slaked lime contained in the bag of hardener. The suspension-type curing agent aqueous solution used in the water glass-based chemical injection method that was formulated by using a bag-type curing agent that had been added in advance is forcibly stirred to average the slaked lime in the suspension-type curing agent aqueous solution. Diameter 1μ
Improving the permeability by changing to a fine hydrous colloidal gel of about m, and mixing the modified suspension type curing agent aqueous solution with the water glass aqueous solution immediately before injecting it into the ground, and forcing this It is characterized in that the fine hydrous colloidal gel is changed into an ultrafine hydrous colloidal gel by stirring to improve the permeability.

[0013]

According to the present invention, by changing the concentration of slaked lime, a variety of liquids ranging from a super instantaneous binding solution having a gel time of about 3 seconds to a slow binding solution having a gel time of about 45 minutes, independently of the homogel strength. Gel time can be set arbitrarily, and by changing the concentration of blast furnace slag fine powder, the homogel strength at 7 days of age is about 1 kgf /
A water glass suspension type penetrating chemical liquid having a large versatility and an improved penetrability, which can be arbitrarily set within a range of from cm ² to about 40 kgf / cm ² , is provided to improve the entire ground with high strength.

Further, by appropriately combining and blending the numbers of the bags of at least one kind of the bag-containing curing agent having different substitution rates and / or net amounts, various gel times and arbitrarily many homogel strengths are obtained. be able to.

[0015]

BACKGROUND AND BACKGROUND OF THE INVENTION In developing a suspension type penetrating chemical liquid used in a water glass chemical injection method, fine blast furnace slag powder (hereinafter referred to as blast furnace slag fine powder) is adopted as a hydraulic component, In a system that uses slaked lime as a stimulant in combination, the gel time can be set arbitrarily by controlling the reaction rate between slaked lime and water glass, and hydration hardening of blast furnace slag fine powder can be normally advanced. In order to complete the present invention, the following various means have been found as a result of earnest research on means for developing a suspension type chemical solution which exhibits high strength by I arrived.

The relationship between slaked lime concentration and gel time was investigated. When the concentration of blast furnace slag fine powder is constant, the relationship between slaked lime concentration and gel time is linear regression on a log-log graph in a fairly wide range of slaked lime concentration, and gel time is inversely proportional to about 2.5th power of slaked lime concentration. I found the fact that. That is, it was found that the relationship between slaked lime concentration and gel time regressed to the hyperbolic equation. When the blast furnace slag fine powder concentration changes, the regression line on the log-log graph moves very slightly in parallel.

Next, when the slaked lime concentration is constant, the relationship between the blast furnace slag fine powder concentration and the homogel strength is linear regression on a logarithmic log graph in a fairly wide range of the blast furnace slag fine powder concentration, and after 3 days of age. It was found that the homogel strength of No. 3 was directly proportional to the square of the blast furnace slag fine powder concentration. That is, it was found that the relationship between the blast furnace slag fine powder concentration and the homogel strength regressed to the parabolic equation.
When the slaked lime concentration changes, the regression line on the log-log graph slightly shifts.

Since the interaction between the slaked lime concentration and the blast furnace slag fine powder concentration is limited to a slight parallel shift of the regression line on the logarithmic log graph, the gel time is determined by the slaked lime concentration independently of the blast furnace slag fine powder concentration. It has been found that the homogel strength can be set by the blast furnace slag fine powder concentration, independently of the slaked lime concentration.

When the concentration of slaked lime is reduced to increase the gel time, the gel time becomes longer, but the gelation reaction of the water glass consumes the entire amount of slaked lime and hydrates and hardens the blast furnace slag fine powder. It has been found that there is a lower limit of slaked lime concentration at which homogel strength is not expressed because slaked lime as a stimulant necessary for syrup does not remain. Therefore, it was found that there is an upper limit value of gel time accompanying the lower limit value of slaked lime concentration.

However, the gel time depends not only on the concentration of slaked lime but also on the average particle size of slaked lime. That is,
When the average particle size of slaked lime is increased, the reaction rate at which slaked lime gels water glass decreases, and the gel time increases even if the concentration of slaked lime is the same. When it is desired to increase the gel time, slaked lime having a large average particle size may be used in addition to the means for reducing the slaked lime concentration as much as possible.

When the slaked lime concentration is increased in order to shorten the gel time, the gel time is shortened. However, since this reaction follows the hyperbolic equation, the upper limit at which the slaked lime concentration is not shortened so much as the slaked lime concentration is increased. There seems to be something. It is possible to shorten the gel time to 2 seconds, but it seems difficult to shorten it to about 1 second.

When the concentration of the blast furnace slag fine powder is reduced, the blast furnace slag fine powder is hydrated, but the amount of hydrated product is too small to contribute to the strength and the homogel strength is not developed. There is a lower limit for the amount of fine powder. However, the lower limit of the homogel strength associated with it becomes phenomenologically infinite.

The homogel strength of an inorganic solution type chemical is usually about 0.02 to 0.03 kgf / cm ² . Since the homogel strength of the suspension type drug solution is required to be higher than that of the solution type drug solution, it is considered that the lower limit of the initial strength of the homogel of the suspension type drug solution is about 1 kgf / cm ² or more. . Although the strength of solution type chemicals cannot be expected to increase with age, suspension type chemicals containing hydraulic components increase their long-term strength. Therefore, if the initial strength is a little larger than that of solution type chemicals, the solution injection method It seems that there is no particular problem.

When the blast furnace slag fine powder concentration is increased in order to increase the homogel strength, this reaction follows the parabolic equation, so that the homogel strength increases in proportion to almost the square of the blast furnace slag fine powder concentration. However, the homogel strength also depends on the specific surface area of the blast furnace slag fine powder. That is, even if the blast furnace slag fine powder concentration is the same, if the specific surface area changes, the homogel strength also changes. When it is desired to increase the homogel strength, blast furnace slag fine powder having a large specific surface area may be used in addition to the means for increasing the concentration of the blast furnace slag fine powder.

Next, the higher the slaked lime concentration and the higher the blast furnace slag fine powder concentration, the higher the homogel strength. However, when the respective concentrations are increased, the viscosity of the suspension-type curing agent aqueous solution increases and There is an upper limit of viscosity which causes a problem in the permeability of the chemical solution. Therefore, the upper limit of the homogel strength is limited by the upper limit of the viscosity of the suspension-type curing agent aqueous solution.

The suspension solution of slaked lime has high cohesiveness as it is used as a coagulant. The use of fine slaked lime also produces large aggregates that can be visually observed. In order to eliminate this strong cohesiveness, it is necessary to add a dispersant within the range of about 1% to about 3% in terms of powder to the amount of slaked lime in the suspension type aqueous solution, and forcibly stir this for several minutes. The slaked lime agglomerate can be crushed.
When observed under a microscope, slaked lime has an average particle size of 1 μm.
It was found that the water-soluble colloidal gel of about m was dispersed. Therefore, the permeability of the suspension solution of slaked lime can be improved by such means.

It should be noted that this phenomenon occurs only in fine slaked lime, and it has been confirmed by microscopic observation that coarse slaked lime entrained in slaked lime does not become the above-mentioned fine hydrous colloidal gel. Therefore, the slaked lime used is preferably slaked lime not entrained with coarse particles.

By mixing the thus modified suspension aqueous solution with a water glass aqueous solution and forcibly stirring for several seconds, it is possible to disintegrate into an ultrafine hydrous colloidal gel that cannot be observed by an optical microscope. I found it.

The ultrafine hydrous colloidal gel immediately after being mixed with the aqueous solution of water glass and forcibly stirred for several seconds was not completely consumed by the gelling reaction until the gelling reaction was completed. The ultrafine hydrous colloidal gel needed to continue the gelling reaction should remain. However, since the hydrocolloid gel that should remain at this stage cannot be observed by an optical microscope, it is considered that it exists as an ultrafine hydrocolloid gel that cannot be observed by an optical microscope. Therefore, by such means, the permeability of the suspension solution of slaked lime can be further improved.

The above reaction was found by observing under the condition that the blast-furnace slag fine powder is not used, because the blast-furnace slag fine powder interferes and the hydrous colloidal gel of slaked lime cannot be observed when the blast-furnace slag fine powder is also used. It is a thing. As long as the concentration of slaked lime is constant, almost the same gel time can be obtained even in a system that also uses blast furnace slag fine powder, or a system that does not contain blast furnace slag fine powder, so blast furnace slag fine powder was used in combination. It is considered that a similar reaction is proceeding in the system as well.

Since the permeability depends on the maximum particle size of the material used, it is preferable that the maximum particle size is small in order to improve the permeability. As mentioned above, since a means for converting slaked lime into ultrafine hydrocolloid gel was developed,
Slaked lime can be used regardless of fineness from the viewpoint of permeability, as long as it does not carry coarse particles. Fine blast furnace slag can also be used if it does not carry coarse particles and has a small specific surface area, but it goes without saying that the one having a large specific surface area has improved permeability, including improved homogel strength. The present invention has been completed by finding various means as described above.

[0032]

EXAMPLES Materials used in the examples are as follows. Slaked lime: Four types of slaked lime commercial products with different average particle sizes. The average particle size is also shown in FIG. In the following figures, it is abbreviated as CH. Blast furnace slag fine powder; two types of blast furnace slag fine powder having different specific surface areas and one type of blast furnace slag powder commercial product.
The specific surface area and average particle size are also shown in FIG. In the following figures, it is abbreviated as SG. Dispersant: Melamine-based high-performance water reducing agent for concrete. Suspension type curing agent aqueous solution: A suspension type curing agent aqueous solution obtained by adding a predetermined amount of slaked lime, blast furnace slag fine powder and a dispersant (including no addition) to a predetermined amount of water and forcibly stirring this for 3 minutes. Water glass aqueous solution: 40 No. 3 water glass commercial product
% Of water glass solution. Chemical liquid of the present invention: A chemical liquid in which a suspension type curing agent aqueous solution and a water glass aqueous solution are mixed at a ratio of 1: 1.

The test method of the examples is as follows. Cup test: The usual cup inversion method. Used for measuring gel time of 1 minute or more. Bag test: Since the conventional cup test cannot measure the gel time of a drug solution with an extremely short gel time, the bag test was adopted. Ф
In a 50 mm cylindrical polyethylene bag, add 100 ml of the suspension-type curing agent aqueous solution, squeeze the center of the bag, and place water glass aqueous solution 100 on it.
Add ml and squeeze the top of the bag. At the same time that the central squeeze is released, the bag is vigorously shaken to mix both solutions quickly, and the gel time is the time until the viscosity of the drug solution rapidly increases. This method was used to measure the gel time of a drug solution having a gel time of less than 1 minute, because the mixing of both solutions can be performed in a shorter time than the cup test. Compressive strength: Measured according to JIS R 5201 (physical test method for cement). However, the test was performed with a homogel that did not use standard sand, and the curing was wet air curing. Sedimentation height; constant slaked lime concentration in suspension solution,
The suspension aqueous solution in which the amount of dispersant added to slaked lime was 0 to 4% was forcibly stirred for 3 minutes, then 200 ml was collected in a 200 ml graduated cylinder, and the height of the precipitate was measured 15 minutes after standing still. did. In this test, when the blast furnace slag fine powder was used together, the blast furnace slag fine powder interfered and the dispersed state of slaked lime could not be observed, so the blast furnace slag fine powder was not used together. Microscopic observation: Observation using an optical microscope with a magnification of 1000 times.

[Example 1] Fig. 1 shows the gel time test results of the chemicals of the present invention when the blast furnace slag fine powder concentration in the suspension-type hardening agent aqueous solution was kept constant at 22% and the type and concentration of slaked lime were changed. Shown in. As the blast furnace slag fine powder, the blast furnace slag fine powder C shown in FIG. 2 was used. As the dispersant, 2% of the amount of slaked lime was added. It can be seen that when the slaked lime concentration is constant, the gel time becomes long in proportion to the average particle size. Further, as will be described later, the lower limit of the concentration of slaked lime seen from the expression of homogel strength is 2%, so the upper limit of the gel time is 2680 seconds when the concentration of slaked lime A is 2%, that is,
It turns out that it is about 45 minutes.

[Example 2] The concentration of slaked lime in the aqueous suspension type curing agent solution was 4%, and the concentration of fine powder of blast furnace slag was 22%.
The test results of the homogel strength of the chemical solution of the present invention when the specific surface area of the blast furnace slag fine powder is changed are shown in FIG. As slaked lime, slaked lime C shown in FIG. 1 was used. As the dispersant, 2% of the amount of slaked lime was added. It can be seen that the homogel strength increases substantially in proportion to the specific surface area when the blast furnace slag fine powder concentration is constant.

[Example 3] Fig. 3 shows the test results of gel time and homogel strength of the chemical solution of the present invention when the blast furnace slag fine powder concentration in the suspension type hardening agent aqueous solution was kept constant at 22% and the slaked lime concentration was changed. And shown in FIG. As the slaked lime, the slaked lime C shown in FIG. 1 was used, and as the blast furnace slag fine powder, the blast furnace slag fine powder C shown in FIG. 2 was used. As the dispersant, 2% of the amount of slaked lime was added.

When the slaked lime concentration is 3%, the initial strength is low, but the homogel strength after 7 days of age is 1 kgf / cm ² or more. Therefore, from the strength side of the homogel when the blast furnace slag fine powder concentration is 22%. The lower limit of the observed concentration of slaked lime is about 3%. The lower limit value of the slaked lime concentration under this condition is point E in FIG.

FIG. 4 shows the relationship between the slaked lime concentration and the gel time from the test results of FIG. 3, but it can be seen that a linear regression is obtained on a log-log graph and that the gel time depends on the slaked lime concentration. Correlation analysis of this revealed that the gel time was inversely proportional to the 2.5th power of the slaked lime concentration.

When the gel time is less than 8 seconds, the linear relationship on the logarithmic graph is broken, but even if the bag test method is adopted, mixing of the suspension-type curing agent aqueous solution and the water glass aqueous solution takes 8 seconds. It cannot be sufficiently performed in a short time of less than approximately, and it is considered that this is an influence of the loss time until the mixture is sufficiently mixed. Even if it deviates from the linear relationship, the gel time still depends on the slaked lime concentration. From the test results of Example-3, the lower limit of gel time is about 2 seconds, but when the slaked lime concentration is about 35% or more, the viscosity of the suspension-type hardening agent aqueous solution exceeds 10 cps as described later, and therefore, it is claimed. The lower limit of gel time in the range of was about 3 seconds.

[Example-4] Fig. 5 shows the test results of the homogel strength of the chemical liquid of the present invention when the concentration of slaked lime in the suspension-type hardening agent aqueous solution was kept constant at 4% and the concentration of fine powder of blast furnace slag was changed.
And shown in FIG. As the slaked lime, the slaked lime C shown in FIG. 1 was used, and as the blast furnace slag fine powder, the blast furnace slag fine powder C shown in FIG. 2 was used. As the dispersant, 2% of the amount of slaked lime was added. The gel time is 300% because the slaked lime concentration is 4% constant.
It was about a second.

FIG. 6 is a graph showing the relationship between the blast furnace slag fine powder concentration and the homogel strength of 7 days old from the test results of FIG. 5, in the case of slaked lime concentrations of 14% and 24%. The daily intensity is also shown. Both are linear regressions on a log-log graph, and it can be seen that the homogel strength depends on the blast furnace slag fine powder concentration. Correlation analysis of this revealed that the homogel strength was directly proportional to the square of the blast furnace slag fine powder concentration. When the blast furnace slag fine powder concentration is 5% or less, the linear relationship on the logarithmic graph is broken, but even if the linear relationship is deviated, the homogel strength still depends on the blast furnace slag fine powder concentration.

As will be described later, when the concentration of the blast furnace slag fine powder is about 40% or more, the viscosity of the suspension-type curing agent aqueous solution exceeds 10 cps, so the concentration of the blast furnace slag fine powder is 40%.
When the homogel strength at 7 days of age is about 40% when read from FIG. 6, it is about 40 kgf / cm ² . The suspension type chemical containing a hydraulic component increases in strength with the progress of age even after 7 days of age, and further increases in final strength. However, in the claims, the upper limit of the homogel strength is set to 7 years of age. Limited by day intensity. Excluding the permeability, from the test results of Example-4, it is possible to realize a homogel strength of 40 kgf / cm ² or more at a material age of 7 days, but with an emphasis on permeability, the upper limit of the homogel strength is claimed in the claims. Was about 40 kgf / cm ² .

From FIG. 6, the homogel strength after 7 days of age is 1 k.
The lower limit value of the blast furnace slag fine powder concentration of gf / cm ² or more was read. The lower limit value of the blast furnace slag fine powder concentration when the slaked lime concentration is 4% is about 8%, and the lower limit value of the blast furnace slag fine powder concentration under this condition is point D in FIG. 9. When the slaked lime concentration is 14%, the lower limit of the blast furnace slag fine powder concentration is about 6
%, And the lower limit value of the blast furnace slag fine powder concentration under this condition is point C in FIG. The lower limit value of the blast furnace slag fine powder concentration when the slaked lime concentration is 24% is about 4%, and the lower limit value of the blast furnace slag fine powder concentration under this condition is point B in FIG. 9.

[Embodiment 5] FIG. 7 shows the measurement results of the viscosity of the suspension-type hardening agent aqueous solution when the slaked lime concentration and the blast furnace slag fine powder concentration were changed. The viscosity increases as the slaked lime concentration and the blast furnace slag fine powder concentration increase. It was considered that the viscosity of the suspension-type hardening agent aqueous solution had a limit of about 10 cps that hinders the permeability of the chemical solution, and the upper limit of the blast furnace slag fine powder concentration at which the viscosity was 10 cps was read for each slaked lime concentration from FIG. 7.

When the slaked lime concentration is 24%, the upper limit value of the blast furnace slag fine powder concentration is about 14%, and the upper limit value of the blast furnace slag fine powder concentration under this condition is point J in FIG. When the slaked lime concentration is 14%, the upper limit value of the blast furnace slag fine powder concentration is about 25%, and the upper limit value of the blast furnace slag fine powder concentration under this condition is point I in FIG. 9. When the slaked lime concentration is 8%, the upper limit value of the blast furnace slag fine powder concentration is about 29%, and the upper limit value of the blast furnace slag fine powder concentration under this condition is point H in FIG. 9. When the slaked lime concentration is 4%, the upper limit value of the blast furnace slag fine powder concentration is about 37%, and the upper limit value of the blast furnace slag fine powder concentration under this condition is point G in FIG. 9. In either case, the total concentration of slaked lime concentration and blast furnace slag fine powder concentration is about 40%.

[Example-6] The intersection of the extrapolation line of the CB line in Fig. 9 and the extrapolation line of the IJ line in Fig. 9 is the upper limit of the slaked lime concentration in terms of viscosity. The slaked lime concentration at the intersection is about 35%. On the other hand, the intersection of the extrapolation line of the DE line in FIG. 9 and the extrapolation line of the HG line in FIG. 9 is the upper limit value of the blast furnace slag fine powder concentration viewed from the viscosity. Blast furnace slag fine powder concentration at the intersection is 4
It is about 0%.

FIG. 8 shows the test results for confirming the lower limit value of the blast furnace slag fine powder concentration when the slaked lime concentration is 35% and the lower limit value of the slaked lime concentration when the blast furnace slag fine powder concentration is 40%. As the slaked lime, the slaked lime C shown in FIG. 1 was used, and as the blast furnace slag fine powder, the blast furnace slag fine powder C shown in FIG. 2 was used. As the dispersant, 2% of the amount of slaked lime was added. Numbers 1 to 4 in FIG. 8 are
Since the gel time was as short as about 3 seconds, each specimen was quickly molded.

Homogel strength of 7 days old is 1 kgf / cm
^{When the} slaked lime concentration of ² or more is 35%, the lower limit of the blast furnace slag fine powder concentration is about 1%, and the lower limit of the blast furnace slag fine powder concentration under this condition is point A in FIG. 9. The lower limit of the slaked lime concentration is about 2 when the homogel strength of 7 days old is 1 kgf / cm ² or more and the blast furnace slag fine powder concentration is 40%.
%, And the lower limit value of the slaked lime concentration under this condition is point F in FIG.

From the results of Example 6, it was finally confirmed that the lower limit of the blast furnace slag fine powder concentration was about 1% and the lower limit of the slaked lime concentration was about 2%. Here, FIG.
Will be described. FIG. 9 shows Example-3 to Example-6.
The test results up to this point are summarized, and the shaded portion in the figure almost matches the region described in the claims.

Example 7 No. 5 of FIG. 3 was selected as a typical example of the slow-releasing drug solution of the present invention, and No. 10 of FIG. The results of stability tests are shown in FIG. As the slaked lime, the slaked lime C shown in FIG. 1 was used, and as the blast furnace slag fine powder, the blast furnace slag fine powder C shown in FIG. 2 was used. As the dispersant, 2% of the amount of slaked lime was added.

It can be seen that the slow-moving drug solution has a small initial strength, but the homogel strength increases with age, the strength is stable after 3 months, and the strength does not increase or decrease. The instant binding solution has a high homogel strength from the beginning, but the rate of increase in strength is smaller than that of the slow-setting solution. It can be seen that the strength after 3 months is stable and there is no increase or decrease in strength.

[Example-8] The concentration of slaked lime in the suspension aqueous solution was kept constant at 4%, the amount of the dispersant added was changed with respect to the amount of the slaked lime, and the amount of the dispersant added to the suspension aqueous solution was forcibly stirred for 3 minutes. The test results of the relationship with the sedimentation height are shown in FIG. In this test, when the blast furnace slag fine powder was used together, the blast furnace slag fine powder interfered and the dispersed state of slaked lime could not be observed, so the blast furnace slag fine powder was not used together. Slaked lime is Figure 1
Slaked lime D.

When the amount of the dispersant added to the amount of slaked lime is less than about 1%, the sedimentation height is almost the same as that when no sediment is added, and the disintegration of the hydrocolloid gel is insufficient and the dispersibility is poor. I understand. When the amount of the dispersant added is about 1% or more, the settling height rapidly decreases. The amount of dispersant added is 3
%, The sedimentation height approaches 0 mm, and it can be seen that the crushed hydrous colloidal gel hardly sediments. It can also be seen that even if the amount of the dispersant added is about 3% or more, the crushing of the hydrous colloidal gel is no longer in progress.

The concentration of slaked lime in the suspension aqueous solution was 20%.
When the amount of dispersant was not added, the slaked lime was separated and settled, and a supernatant was observed, but when the dispersant was added, the separation and settling phenomenon was not observed regardless of the amount of added dispersant. It was not possible to numerically observe the relationship between the amount of dispersant added and the height of sedimentation. This is because the amount of slaked lime in the suspension aqueous solution was large, and the specific gravity in the suspension aqueous solution became large, making it difficult to separate and settle.However, the same phenomenon as when the concentration of slaked lime was small occurred. Can be assumed.

[Example-9] The suspended aqueous solution having a slaked lime concentration of 4% prepared in Example-8 was observed with a microscope. When the amount of dispersant added is about 3%, slaked lime has an average particle size of 1 μm.
It is observed that the particles are dispersed in the form of a fine and transparent hydrous colloidal gel. In this case, it is observed that the hydrous colloidal gel exists as coarse aggregates that can be visually observed unless disintegration is performed by forced stirring for about 3 minutes.

When the amount of the dispersant added is 1 to 2%, the hydrous colloidal gel has an average particle size of about 1 μm, but the hydrous colloidal gel partially remains even after forced stirring for 3 minutes or more. Are observed to be aggregated.

When the amount of the dispersant added is less than 1%, it is observed that coarse agglomerates that can be observed with the naked eye are present even if forced stirring is performed for 3 minutes or more. When the slaked lime concentration was 20%, a similar phenomenon was observed by microscopic observation, but the concentration in the suspension aqueous solution was too high, and the situation could not be confirmed by visual observation.

[Example-10] The reaction between the suspension aqueous solution having a slaked lime concentration of 4% prepared in Example-8 and the aqueous solution of water glass was observed. On a black plastic plate, add one drop of a water glass aqueous solution to one drop of the suspension aqueous solution when the amount of the dispersant added is 1 to 3%, and forcibly stir with the glass rod for several seconds to obtain a suspension aqueous solution. It can be visually observed that the solution immediately becomes a transparent aqueous solution. When observing this transparent aqueous solution with a microscope,
The hydrocolloid gel has disappeared and cannot be observed with an optical microscope.

Next, on a black plastic plate, one drop of the aqueous solution of water glass was added to one drop of the aqueous suspension solution without addition of a dispersant, and forced stirring was performed for several seconds with a glass rod. Although it is a transparent aqueous solution, it is visually observed that island-like gel-like substances are suspended. This is because if no dispersant is added, slaked lime is a coarse aggregate of hydrous colloidal gel that can be observed with the naked eye.
Since it is not sufficiently dispersed, there is a thick part of the hydrous colloidal gel locally, and it is considered that this causes a gelation reaction with the water glass aqueous solution in a short time to form island-shaped silicate gel and calcium silicate gel. To be The formation of this island-shaped gel hinders the permeability of the drug solution, and is not a preferable phenomenon as an osmotic drug solution. When the concentration of slaked lime was 20%, the same phenomenon was observed, and although an almost transparent aqueous solution was obtained, the impurities or coarse slaked lime remaining along with the slaked lime were visually observed.

The present invention is a blast furnace slag fine powder in which slaked lime is replaced within the range of 0% to 100% when the water glass suspension type penetrating chemical liquid according to the present invention is blended. The number of bags of at least one type of bag-containing curing agent having different rates and / or net weights is appropriately combined and blended. This makes it possible to obtain arbitrarily many gel times and optionally many strengths. Hereinafter, a calculation example of the combination formulation will be described in the case of blending an aqueous curing agent solution with a curing agent contained in a bag, with one batch being 200 liters and the conventional dose in the art.

[Calculation Example-1] For example, assume that one kind of bag-type curing agent containing a total of 10 kg of slaked lime 4 kg and blast furnace slag fine powder 6 kg. The amount of slaked lime and the amount of blast furnace slag fine powder per batch when this bag-type curing agent was used in integer bags were calculated, and the gel times and homogel strengths corresponding to these amounts were read and arranged from FIGS. 4 and 6. The thing is FIG.

The amount of slaked lime is an arithmetic sequence with the first term being 4 kg and the tolerance being 4 kg, and the blast furnace slag fine powder amount is an arithmetic sequence having the initial term of 6 kg and the tolerance being 6 kg. Although this number sequence continues infinitely, the rate at which the amount of slaked lime is increased has a limit at which the gel time does not decrease, so the number of bags is discontinuous in the portion where the amount of slaked lime is large. From Figure 12, gel time is 2 seconds to 2
The homogel strength is 0.1 to 70 kgf in the range of 000 seconds.
It can be seen that it can be set in the range of / cm ² , but this is a calculation example, and the gel time described in the claims is in the range of about 3 seconds to about 45 minutes, and the homogel strength is about 1 k.
It is in the range of gf / cm ² to about 40 kgf / cm ² .

[Calculation Example-2] Since the relationship between the amount of slaked lime and the gel time follows a hyperbolic equation, the settable gel time interval gradually increases in the portion where the amount of slaked lime is small. On the other hand, since the relationship between the amount of fine powder of blast furnace slag and the homogel strength follows the parabolic equation, the interval of the homogel strength that can be set gradually increases in the portion where the amount of fine powder of blast furnace slag is large.

Therefore, for example, assuming a bag-containing curing agent containing a total of 5 kg of slaked lime 2 kg and blast furnace slag fine powder 3 kg, and if this curing agent bag is used as an integer bag of two or more bags, the first term is the same. The tolerance is half the arithmetic progression, and the settable gel times and the number of homogel strengths are twice those of Calculation Example-1.

If the tolerance is made as small as possible by the same means, the number of gel times and homogel strengths that can be set becomes infinite, though it is discontinuous, and the interval between the gel times and homogel strengths that can be set becomes larger. Can be interpolated. However, it is not a good idea to reduce the weight of the bag by mistake, because the number of bags per batch increases, so you should set the optimal conditions in consideration of the gel time and the number of homogel strength that can be set, economy, convenience, etc. Good.

Although there is a lower limit of the amount of slaked lime and blast furnace slag fine powder used, the lower limit of the weight of the curing agent bag of the present invention cannot be limited. This is because even if the weight of the curing agent bag is less than or equal to the respective lower limit values, it is possible to add an amount exceeding the lower limit value by using a plurality of bags. Therefore, since it is not necessary to pay attention to the lower limit values of the slaked lime concentration and the blast furnace slag fine powder concentration, the mixing ratio and the total weight of the slaked lime and the blast furnace slag fine powder are within a range in which the number of bags per batch does not increase too much. The gel time and the homogel strength that can be set may be set as large as possible. The above is a description in which a large number of gel times and homogel strengths can be arbitrarily set even if there is only one type of curing agent in the bag.

[Calculation Example-3] The following method is also conceivable as an interpolation method for the phenomenon in which the interval between the set gel time and the homogel strength increases. For example, a total of 10 kg of slaked lime 4 kg and blast furnace slag fine powder 6 kg
A hardener in a bag and a slaked lime content that weighs 2
Example of calculating the interval between gel time and homogel strength that can be set by using three types of hardener in a bag, a hardener pouch that weighs kg and a hardener pouch that contains only blast furnace slag fine powder and weighs 3 kg. It can be smaller than -1. If the weight of the curing agent pouch is reduced as much as possible, the phenomenon in which the interval between the gel time and the homogel strength that can be set in the same manner as described above becomes large can be interpolated.

As described above, even if there are three kinds of hardening agents in the bag and the substitution rate of slaked lime is 0% to 100%, that is, the contents of the hardening agent pouch are slaked lime and blast furnace slag. This is an explanation that the gel time and the homogel strength can be arbitrarily set in large numbers even if the powder is a plain product.
Also in this case, the mixing ratio of the slaked lime and the blast furnace slag fine powder and the weight of the bag may be arbitrary.

[Calculation example-4] For example, two types of bags, a slaked lime only bag containing hardening agent containing 8 kg and a blast furnace slag fine powder containing 12 kg bag containing hardening agent, are included in the bag. A hardener is assumed. The amount of slaked lime and the amount of fine powder of blast furnace slag per batch when the bag-containing curing agent was used in integer bags were calculated, and the gel times and homogel strengths corresponding to these amounts were read from FIGS. 4 and 6 and arranged. FIG. 13 shows one, and a plurality of homogel strengths can be set for each gel time.

The interpolation method of the phenomenon in which the interval between the set gel time and the homogel strength increases can be interpolated by the same method as described above, and a large number of gel times and homogel strengths can be arbitrarily set. That is, the curing agent contained in the bag may be only two types of plain products. Also in this case, the weight of the bag may be arbitrary.

[Calculation Example-5] A method of improving the fact that the number of pouches per batch increases by interpolating the phenomenon that the interval between the set gel time and homogel strength gradually increases will be described. For example, when a large bag of hardener having a content of only slaked lime and a weight of about 20 kg and a large bag of content having only a blast furnace slag fine powder and a weight of about 20 kg are used together, a slaked lime amount of about 20 kg or more and a blast furnace are provided. It is possible to reduce the number of bags when blending the amount of slag fine powder. The upper limit of the net weight of the curing agent bag should be set as a common sense within the range that one worker can easily carry it and the compounding work can be performed easily. It cannot be limited if you think about it. Although the case where the number of bags is an integer has been described, it goes without saying that if the number of bags is a fraction, the number of gel times and homogel strength that can be set can be further increased.

[0072]

As described above, according to the present invention, when the suspension type hardening agent aqueous solution used in the water glass type chemical injection method is blended, the gel time is independent of the homogel strength only by changing the slaked lime concentration. From the super-instantaneous drug solution for about 3 seconds,
Various gel times up to a slow-moving drug solution with a gel time of about 45 minutes can be set arbitrarily, and by simply changing the blast furnace slag fine powder concentration, the gel time can be set independently of the gel time.
It is possible to provide a suspension type permeability chemical large water glass type of versatility that can be set arbitrarily within a range of Homogeru strength at the age of 7 days from about 1 kgf / cm ² of about up to about 40 kgf / cm ² . This water-based suspension type penetrating chemical solution with great versatility is provided, and the selection range is widened. The effect of the present invention in which the suspension type penetrating drug solution can be selected is great.

By using only one set of hardening agents (slaked lime and blast furnace slag fine powder), it is possible to mix water-glass suspension type penetrating chemicals for various purposes.
The complexity of stocking and managing various types of curing agents can be eliminated.

Since only one set of curing agents is used, the gel time and homogel strength of the water-glass suspension type penetrating chemical can be changed gradually or rapidly. It is possible to quickly respond to changes in. Further, since only one set of curing agent is used, the homogel strength of the water-glass suspension type penetrating chemical solution can be gradually or rapidly changed. Even in the field, it is possible to separately inject a low-strength chemical solution into a portion having low strength and a high-strength chemical solution into a portion requiring high strength.

A suspension type osmotic drug solution having a long gel time up to about 45 minutes, a suspension type osmotic drug solution having a short gel time up to about 3 seconds, and about 40 kgf / at 7 days of age at any gel time. It is possible to provide a water-glass-based suspension type penetrating chemical liquid in a field that has not been commercially available, such as a suspension type penetrating high-strength chemical liquid up to about cm ² .

In the water glass type chemical injection method, a suspension type penetrating chemical having the required performance has not been provided although there is a need. Therefore, for example, in the field where only the suboptimal chemical can be used. In the multi-phase injection method of a suspension type drug solution, in the field where a low strength solution type slow-releasing drug solution is used together as a drug solution of suboptimal performance, a suspension having a long gel time and a large homogel strength of the present invention When the type osmotic drug solution is provided, the suspension type osmotic drug solution having high strength in both quick-setting property and slow-setting property can be used in combination, so that the entire ground can be improved with high strength.

Further, the effect of the present invention, which was able to improve the permeability of the suspension type drug solution, was developed by developing a means for crushing aggregates of slaked lime having a strong aggregation property to the extent that they cannot be seen by an optical microscope. Is large.

Further, the suspension type chemical liquid of the present invention used in the water glass type chemical liquid injection method can set an arbitrary gel time from the super instantaneous setting type to the slow setting type by combining only one set of the curing agents in the bag. Since it is possible to set the strength of the homogel and the strength of the homogel can be set arbitrarily, there is a beneficial effect for the user and the producer.

[Brief description of drawings]

FIG. 1 is a table showing gel time test results when slaked limes having different average particle sizes are used.

FIG. 2 is a table showing the homogel strength test results when blast furnace slag fine powders having different specific surface areas are used.

FIG. 3 is a table showing the test results of gel time and homogel strength when the blast furnace slag fine powder concentration in the suspension-type curing agent aqueous solution is kept constant and the slaked lime concentration is changed.

FIG. 4 is a graph showing the relationship between slaked lime concentration and gel time in an aqueous suspension-type curing agent solution.

FIG. 5 is a table showing the homogel strength test results when the slaked lime concentration in the suspension type curing agent aqueous solution is kept constant and the blast furnace slag fine powder concentration is changed.

FIG. 6 is a graph showing the relationship between the blast furnace slag fine powder concentration and the homogel strength in the suspension-type curing agent aqueous solution for each concentration of slaked lime.

FIG. 7 is a graph showing the relationship between the concentration of blast furnace slag fine powder and viscosity in an aqueous suspension-type curing agent solution, by concentration of slaked lime.

FIG. 8 is a table showing test results for confirming the lower limits of slaked lime concentration and blast furnace slag fine powder concentration.

FIG. 9 is a graph showing the basis of the present invention described in the claims.

FIG. 10 is a table showing long-term strength test results of representative examples of the slow-releasing suspension type drug solution and the instant-setting suspension type drug solution of Examples.

FIG. 11 is a graph showing the relationship between the amount of dispersant added and the settling height when the amount of slaked lime is fixed and the amount of dispersant added is changed with respect to the amount of slaked lime.

FIG. 12: Assuming one type of bag-type curing agent containing 10 kg in total of 4 kg of slaked lime and 6 kg of blast furnace slag fine powder,
Calculation results of the amount of slaked lime and the amount of blast furnace slag fine powder per batch when this bag-type curing agent is used in integer bags,
Table showing gel times and homogel strengths corresponding to these amounts

[FIG. 13] Assuming two types of bag hardeners, a slaked lime only bag hardener having a weight of 8 kg and a blast furnace slag fine powder only bag hardener having a weight of 12 kg. A table showing the calculation results of the amount of slaked lime and the amount of fine powder of blast furnace slag per batch when this bagging curing agent is used in integer bags, and the gel time and homogel strength corresponding to these amounts.

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[Procedure amendment]

[Submission date] May 29, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0060

[Correction method] Change

[Correction content]

The present invention is a blast furnace slag fine powder in which slaked lime is replaced within the range of 0% to 100% when the water glass suspension type penetrating chemical liquid according to the present invention is blended. The number of bags of at least one type of bag-containing curing agent having different rates and / or net weights is appropriately combined and blended. This makes it possible to obtain arbitrarily many gel times and optionally many strengths. Hereinafter, a calculation example of the combination formulation will be described in the case of blending an aqueous curing agent solution with a curing agent contained in a bag, with one batch being 200 liters and the conventional dose in the art. It should be noted that the drug solution of the present invention should not be used for this type of drug solution.
Needless to say, existing cement, plaster, etc. can be used in combination.
Absent.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Obata 1483 Yamazaki-cho, Machida, Tokyo 8-8-204 (72) Inventor Shigeyoshi Tomita 5-19-16 Minamisuna, Koto-ku, Tokyo (72) Inventor Kazuo Shimoda 7-6 Minamiuraga, Yokosuka City, Kanagawa Prefecture

Claims (3)

[Claims] 1. A blast furnace having a slaked lime concentration within the range of about 2% to about 35% in the suspension-type curing agent aqueous solution when blending the suspension-type curing agent aqueous solution used in the water glass chemical injection method. By setting the concentration of the slag fine powder within the range of about 1% to about 40% and by setting the total concentration of the slaked lime concentration and the blast furnace slag fine powder concentration in the aqueous suspension-type curing agent to about 40% or less, the homogel Independent of the strength, it is possible to set any gel time within the range of about 3 seconds to about 45 minutes, and independently of the gel time, the homogel strength of 7 days old is about 1 kgf / cm ² to about. 40 kgf / cm ²
A water-glass suspension type penetrating drug solution, which can be arbitrarily set within the range. 2. A blast furnace having a slaked lime concentration within the range of about 2% to about 35% in the suspension-type curing agent aqueous solution when the suspension-type curing agent aqueous solution used in the water glass-based chemical injection method is blended. By setting the concentration of the slag fine powder within the range of about 1% to about 40% and by setting the total concentration of the slaked lime concentration and the blast furnace slag fine powder concentration in the aqueous suspension-type curing agent to about 40% or less, the homogel Independent of the strength, it is possible to set any gel time within the range of about 3 seconds to about 45 minutes, and independently of the gel time, the homogel strength of 7 days old is about 1 kgf / cm ² to about. 40 kgf / cm ²
Can be set arbitrarily within the range of 0% to 10%
A blast-furnace slag fine powder in which slaked lime is replaced within a range of 0%, wherein the number of bags of at least one kind of bag-hardening agent having different substitution rates and / or net weights is appropriately combined and blended. A water-glass suspension type penetrating drug solution. 3. The amount of slaked lime contained in the aqueous suspension type curing agent solution used in the water glass chemical injection method is within the range of about 1% to about 3% in terms of powder or powder or About 1% of suspension type hardener aqueous solution to which liquid dispersant is added, or the amount of slaked lime contained in the hardener contained in a bag.
% To about 3%, forcibly stirring the suspension-type curing agent aqueous solution used in the water glass-based chemical injection method in which a bag-type curing agent to which a powder dispersant has been added in advance is blended. hand,
Immersion is improved by changing slaked lime in the suspension type hardener aqueous solution into a fine hydrous colloidal gel with an average particle size of about 1 μm, and the suspension type hardener aqueous solution thus modified is injected into the ground. Immediately before mixing with water glass solution,
3. The water glass suspension type penetrability according to claim 1 or 2, wherein the penetration is improved by forcibly stirring this to change the fine hydrous colloidal gel into an ultrafine hydrous colloidal gel. Drug solution.